[x264-devel] Fix cases in which intra refresh allowed prediction from disallowed pixels

[Anton Mitrofanov]

x264 | branch: master | Anton Mitrofanov <BugMaster at narod.ru> | Tue Jul 23 14:11:50 2013 -0700| [f3d9a5839978125fa3f95b38460f8c8854feec24] | committer: Jason Garrett-Glaser

Fix cases in which intra refresh allowed prediction from disallowed pixels

> http://git.videolan.org/gitweb.cgi/x264.git/?a=commit;h=f3d9a5839978125fa3f95b38460f8c8854feec24
---

 encoder/analyse.c |   22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/encoder/analyse.c b/encoder/analyse.c
index 5c6fa52..dc46e65 100644
--- a/encoder/analyse.c
+++ b/encoder/analyse.c
@@ -618,6 +618,24 @@ static const int8_t chroma_mode_available[5][5] =
     {I_PRED_CHROMA_V, I_PRED_CHROMA_H, I_PRED_CHROMA_DC, I_PRED_CHROMA_P, -1},
 };
 
+static const int8_t i8x8_mode_available[2][5][10] =
+{
+    {
+        {I_PRED_4x4_DC_128, -1, -1, -1, -1, -1, -1, -1, -1, -1},
+        {I_PRED_4x4_DC_LEFT, I_PRED_4x4_H, I_PRED_4x4_HU, -1, -1, -1, -1, -1, -1, -1},
+        {I_PRED_4x4_DC_TOP, I_PRED_4x4_V, I_PRED_4x4_DDL, I_PRED_4x4_VL, -1, -1, -1, -1, -1, -1},
+        {I_PRED_4x4_DC, I_PRED_4x4_H, I_PRED_4x4_V, I_PRED_4x4_DDL, I_PRED_4x4_VL, I_PRED_4x4_HU, -1, -1, -1, -1},
+        {I_PRED_4x4_DC, I_PRED_4x4_H, I_PRED_4x4_V, I_PRED_4x4_DDL, I_PRED_4x4_DDR, I_PRED_4x4_VR, I_PRED_4x4_HD, I_PRED_4x4_VL, I_PRED_4x4_HU, -1},
+    },
+    {
+        {I_PRED_4x4_DC_128, -1, -1, -1, -1, -1, -1, -1, -1, -1},
+        {I_PRED_4x4_DC_LEFT, I_PRED_4x4_H, I_PRED_4x4_HU, -1, -1, -1, -1, -1, -1, -1},
+        {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1},
+        {I_PRED_4x4_H, I_PRED_4x4_HU, -1, -1, -1, -1, -1, -1, -1, -1},
+        {I_PRED_4x4_H, I_PRED_4x4_HD, I_PRED_4x4_HU, -1, -1, -1, -1, -1, -1, -1},
+    }
+};
+
 static const int8_t i4x4_mode_available[2][5][10] =
 {
     {
@@ -632,7 +650,7 @@ static const int8_t i4x4_mode_available[2][5][10] =
         {I_PRED_4x4_DC_LEFT, I_PRED_4x4_H, I_PRED_4x4_HU, -1, -1, -1, -1, -1, -1, -1},
         {I_PRED_4x4_DC_TOP, I_PRED_4x4_V, -1, -1, -1, -1, -1, -1, -1, -1},
         {I_PRED_4x4_DC, I_PRED_4x4_H, I_PRED_4x4_V, I_PRED_4x4_HU, -1, -1, -1, -1, -1, -1},
-        {I_PRED_4x4_DC, I_PRED_4x4_H, I_PRED_4x4_V, I_PRED_4x4_DDR, I_PRED_4x4_VR, I_PRED_4x4_HD, I_PRED_4x4_HU, -1},
+        {I_PRED_4x4_DC, I_PRED_4x4_H, I_PRED_4x4_V, I_PRED_4x4_DDR, I_PRED_4x4_VR, I_PRED_4x4_HD, I_PRED_4x4_HU, -1, -1, -1},
     }
 };
 
@@ -655,7 +673,7 @@ static ALWAYS_INLINE const int8_t *predict_8x8_mode_available( int force_intra,
     int avoid_topright = force_intra && (i&1);
     int idx = i_neighbour & (MB_TOP|MB_LEFT|MB_TOPLEFT);
     idx = (idx == (MB_TOP|MB_LEFT|MB_TOPLEFT)) ? 4 : idx & (MB_TOP|MB_LEFT);
-    return i4x4_mode_available[avoid_topright][idx];
+    return i8x8_mode_available[avoid_topright][idx];
 }
 
 static ALWAYS_INLINE const int8_t *predict_4x4_mode_available( int force_intra, int i_neighbour, int i )